function setOperationVisible(visible,num)
{
	if(visible == 'true')
	{	
		return;
	}

	for(var i=1; i<=num; i=i+1)
	{
		var ope;
		var img;
		if(i<10)
		{
			ope = document.getElementById("ope0" + i);
			img = document.getElementById("img0" + i);
		}	
		else
		{
			ope = document.getElementById("ope" + i);
			img = document.getElementById("img" + i);
		}
		ope.parentNode.removeChild(ope);
		img.removeAttribute("onmouseover");
		img.removeAttribute("onmouseout");
	}
}